1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 Nathan Whitehorn 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/module.h> 33 #include <sys/malloc.h> 34 #include <sys/bus.h> 35 #include <sys/cpu.h> 36 #include <machine/bus.h> 37 #include <machine/intr_machdep.h> 38 39 #include <dev/ofw/openfirm.h> 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 #include <powerpc/pseries/plpar_iommu.h> 44 45 #include "iommu_if.h" 46 47 static int vdevice_probe(device_t); 48 static int vdevice_attach(device_t); 49 static const struct ofw_bus_devinfo *vdevice_get_devinfo(device_t dev, 50 device_t child); 51 static int vdevice_print_child(device_t dev, device_t child); 52 static struct resource_list *vdevice_get_resource_list(device_t, device_t); 53 static bus_dma_tag_t vdevice_get_dma_tag(device_t dev, device_t child); 54 55 /* 56 * VDevice devinfo 57 */ 58 struct vdevice_devinfo { 59 struct ofw_bus_devinfo mdi_obdinfo; 60 struct resource_list mdi_resources; 61 bus_dma_tag_t mdi_dma_tag; 62 }; 63 64 static device_method_t vdevice_methods[] = { 65 /* Device interface */ 66 DEVMETHOD(device_probe, vdevice_probe), 67 DEVMETHOD(device_attach, vdevice_attach), 68 69 /* Bus interface */ 70 DEVMETHOD(bus_add_child, bus_generic_add_child), 71 DEVMETHOD(bus_child_pnpinfo, ofw_bus_gen_child_pnpinfo), 72 DEVMETHOD(bus_print_child, vdevice_print_child), 73 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 74 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 75 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 76 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 77 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 78 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 79 DEVMETHOD(bus_get_resource_list, vdevice_get_resource_list), 80 81 /* ofw_bus interface */ 82 DEVMETHOD(ofw_bus_get_devinfo, vdevice_get_devinfo), 83 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 84 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 85 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 86 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 87 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 88 89 /* IOMMU interface */ 90 DEVMETHOD(bus_get_dma_tag, vdevice_get_dma_tag), 91 DEVMETHOD(iommu_map, phyp_iommu_map), 92 DEVMETHOD(iommu_unmap, phyp_iommu_unmap), 93 94 DEVMETHOD_END 95 }; 96 97 static driver_t vdevice_driver = { 98 "vdevice", 99 vdevice_methods, 100 0 101 }; 102 103 DRIVER_MODULE(vdevice, ofwbus, vdevice_driver, 0, 0); 104 105 static int 106 vdevice_probe(device_t dev) 107 { 108 const char *name; 109 110 name = ofw_bus_get_name(dev); 111 112 if (name == NULL || strcmp(name, "vdevice") != 0) 113 return (ENXIO); 114 115 if (!ofw_bus_is_compatible(dev, "IBM,vdevice")) 116 return (ENXIO); 117 118 device_set_desc(dev, "POWER Hypervisor Virtual Device Root"); 119 120 return (0); 121 } 122 123 static int 124 vdevice_attach(device_t dev) 125 { 126 phandle_t root, child; 127 device_t cdev; 128 struct vdevice_devinfo *dinfo; 129 130 root = ofw_bus_get_node(dev); 131 132 /* The XICP (root PIC) will handle all our interrupts */ 133 powerpc_register_pic(root_pic, OF_xref_from_node(root), 134 1 << 24 /* 24-bit XIRR field */, 1 /* Number of IPIs */, FALSE); 135 136 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 137 dinfo = malloc(sizeof(*dinfo), M_DEVBUF, M_WAITOK | M_ZERO); 138 139 if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, 140 child) != 0) { 141 free(dinfo, M_DEVBUF); 142 continue; 143 } 144 resource_list_init(&dinfo->mdi_resources); 145 146 ofw_bus_intr_to_rl(dev, child, &dinfo->mdi_resources, NULL); 147 148 cdev = device_add_child(dev, NULL, -1); 149 if (cdev == NULL) { 150 device_printf(dev, "<%s>: device_add_child failed\n", 151 dinfo->mdi_obdinfo.obd_name); 152 ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo); 153 free(dinfo, M_DEVBUF); 154 continue; 155 } 156 device_set_ivars(cdev, dinfo); 157 } 158 159 return (bus_generic_attach(dev)); 160 } 161 162 static const struct ofw_bus_devinfo * 163 vdevice_get_devinfo(device_t dev, device_t child) 164 { 165 return (device_get_ivars(child)); 166 } 167 168 static int 169 vdevice_print_child(device_t dev, device_t child) 170 { 171 struct vdevice_devinfo *dinfo; 172 struct resource_list *rl; 173 int retval = 0; 174 175 dinfo = device_get_ivars(child); 176 rl = &dinfo->mdi_resources; 177 178 retval += bus_print_child_header(dev, child); 179 180 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 181 182 retval += bus_print_child_footer(dev, child); 183 184 return (retval); 185 } 186 187 static struct resource_list * 188 vdevice_get_resource_list (device_t dev, device_t child) 189 { 190 struct vdevice_devinfo *dinfo; 191 192 dinfo = device_get_ivars(child); 193 return (&dinfo->mdi_resources); 194 } 195 196 static bus_dma_tag_t 197 vdevice_get_dma_tag(device_t dev, device_t child) 198 { 199 struct vdevice_devinfo *dinfo; 200 while (child != NULL && device_get_parent(child) != dev) 201 child = device_get_parent(child); 202 dinfo = device_get_ivars(child); 203 204 if (dinfo->mdi_dma_tag == NULL) { 205 bus_dma_tag_create(bus_get_dma_tag(dev), 206 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 207 NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED, 208 BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->mdi_dma_tag); 209 phyp_iommu_set_dma_tag(dev, child, dinfo->mdi_dma_tag); 210 } 211 212 return (dinfo->mdi_dma_tag); 213 } 214